What is wrong with the Iliad's power-saving? - Page 3

scotty1024 · 10-01-2006, 08:51 PM

I've designed 3 embedded linux systems and none took this long to boot, with slower CPU's. If they have the MSystem's tuned down then it's costing us battery. The faster we can load and go, the sooner the system can get back to sleep.

arivero · 10-05-2006, 11:49 AM

Remember that iLiad boot is strange in the sense that they first boot into a bash script, and then this script boots into init.

scotty1024 · 10-05-2006, 12:10 PM

And I never ever did that (boot into bash).

Nor can I really think of why I would, now that you mention it...

CommanderROR · 10-09-2006, 04:52 AM

The guys int the Sony Forum are having trouble measuring their battery-life. The Device seems to refuse to consume any energy...:-)

Since the Sony Reader is also a Linux device, battery-life in these regions should be possible for the Iliad as well.

Let's hope iRex devote some resources to working on this soon...

tribble · 10-09-2006, 05:18 AM

Oh yes, please. I would soooooo dig that

Its quite funny to see the Reader people have trouble measureing their battery life. Thats a problem i would like to have.

Alexander Turcic · 10-09-2006, 05:50 AM

How about we collect what we already know:

both devices use the same display technology (E Ink)
the iLiad screen is bigger (8.1") than the Sony Reader screen (6") -> Q: is battery negatively influenced by a bigger E Ink screen?
the iLiad offers 16 gray levels, the Sony only 4 -> Q: is the battery negatively influenced by the number of gray levels?
both devices run on Linux -> Q: kernel versions?, loaded modules?
the iLiad has WiFi 802.11b -> Q: in power-savings mode, can it be completely turned off?
the iLiad uses a WaCom Penabled touchscreen ->Q: in power-savings mode, can it be completely turned off? By how much does it affect battery life?
the iLiad uses a Li-ion 1100mAh battery -> Q: what is the capacity of the battery used by the Sony?
the CPU of the iLiad is an Intel XScale 400MHz PXA 255 -> Q: in power-savings mode, CPU could be throttled down to 200MHz, is this already working with the latest software? What CPU does the Sony use?

igorsk · 10-09-2006, 06:42 AM

Reader uses kernel 2.4.17 (n12) and CPU Dragonball MXL from Motorola.

jæd · 10-09-2006, 06:55 AM

Quote:

Originally Posted by CommanderROR

Since the Sony Reader is also a Linux device, battery-life in these regions should be possible for the Iliad as well.

They may be both Linux devices but there the simularities end... The Illiad has much more bolted onto it (wifi, stylus, touch sensitive) and has a much larger screen... Comparing the Illiad and the Sony Reader is like comparing Apples and Oranges...

Quote:

Originally Posted by CommanderROR

Let's hope iRex devote some resources to working on this soon...

As far I recall they always have done and are due to be improving this with the next release...

DrBibber · 10-09-2006, 10:05 AM

And I guess the Sony uses a Sony battery. This may reduce its overall lifetime ;-)

doctorow · 10-09-2006, 10:13 AM

Quote:

Originally Posted by DrBibber

And I guess the Sony uses a Sony battery. This may reduce its overall lifetime ;-)

Whose... yours or that of the Sony Reader?

CommanderROR · 10-09-2006, 10:56 AM

@jaed

The similarities don't end there. All the additional features of the Iliad can be turned off when you don't use them, so the only factor is the CPU and the larger screen. the CPU should not be a major problem since it will also be in idle mode most of the time if you use the Iliad like a Sony Reader (e.g. just for reading).
The larger screen is an unknown factor, just like the additional gray-levels. Apart from that, you can compare the devices very well.

doctorow · 10-09-2006, 11:04 AM

Quote:

Originally Posted by CommanderROR

the CPU should not be a major problem since it will also be in idle mode most of the time if you use the Iliad like a Sony Reader (e.g. just for reading).

You can find the technical papers for the CPU here:
http://www.intel.com/design/pca/prod...5/techdocs.htm

DrBibber · 10-09-2006, 11:05 AM

But isn't it too hypothetically? Do we know the capacity of the iLiads and the Sony battery to have a comparison? Maybe one of the both devices is better in energy saving and loses this benefit because of low dimensioned batteries.

jæd · 10-09-2006, 11:22 AM

Quote:

Originally Posted by CommanderROR

@jaed

The similarities don't end there. All the additional features of the Iliad can be turned off when you don't use them, so the only factor is the CPU and the larger screen. the CPU should not be a major problem since it will also be in idle mode most of the time if you use the Iliad like a Sony Reader (e.g. just for reading).
The larger screen is an unknown factor, just like the additional gray-levels. Apart from that, you can compare the devices very well.

So... If you turn off the additional hardware, and make assumptions for a larger screen and a different sized battery, and a slightly different cpu, its a similar device...?

doctorow · 10-09-2006, 11:26 AM

Well in all fairness, the two devices are similar in the way that they claim to be e-readers. And from e-readers - especially with E Ink technology - one should expect a decent battery life.

10-09-2006, 05:50 AM	#36
Alexander Turcic Fully Converged Posts: 18,175 Karma: 14021202 Join Date: Oct 2002 Location: Switzerland Device: Too many to count here.	How about we collect what we already know: both devices use the same display technology (E Ink) the iLiad screen is bigger (8.1") than the Sony Reader screen (6") -> Q: is battery negatively influenced by a bigger E Ink screen? the iLiad offers 16 gray levels, the Sony only 4 -> Q: is the battery negatively influenced by the number of gray levels? both devices run on Linux -> Q: kernel versions?, loaded modules? the iLiad has WiFi 802.11b -> Q: in power-savings mode, can it be completely turned off? the iLiad uses a WaCom Penabled touchscreen ->Q: in power-savings mode, can it be completely turned off? By how much does it affect battery life? the iLiad uses a Li-ion 1100mAh battery -> Q: what is the capacity of the battery used by the Sony? the CPU of the iLiad is an Intel XScale 400MHz PXA 255 -> Q: in power-savings mode, CPU could be throttled down to 200MHz, is this already working with the latest software? What CPU does the Sony use?

10-09-2006, 06:42 AM	#37
igorsk Wizard Posts: 3,442 Karma: 300001 Join Date: Sep 2006 Location: Belgium Device: PRS-500/505/700, Kindle, Cybook Gen3, Words Gear	Reader uses kernel 2.4.17 (n12) and CPU Dragonball MXL from Motorola. Last edited by igorsk; 10-09-2006 at 06:44 AM.

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10-01-2006, 08:51 PM	#31
scotty1024 Banned Posts: 1,300 Karma: 1479 Join Date: Jul 2006 Location: Peoples Republic of Washington Device: Reader / iPhone / Librie / Kindle	I've designed 3 embedded linux systems and none took this long to boot, with slower CPU's. If they have the MSystem's tuned down then it's costing us battery. The faster we can load and go, the sooner the system can get back to sleep.

10-05-2006, 11:49 AM	#32
arivero Guru Posts: 607 Karma: 2157 Join Date: Oct 2005 Device: NCR3125, Nokia 770,...	Remember that iLiad boot is strange in the sense that they first boot into a bash script, and then this script boots into init.

10-05-2006, 12:10 PM	#33
scotty1024 Banned Posts: 1,300 Karma: 1479 Join Date: Jul 2006 Location: Peoples Republic of Washington Device: Reader / iPhone / Librie / Kindle	And I never ever did that (boot into bash). Nor can I really think of why I would, now that you mention it...

10-09-2006, 04:52 AM	#34
CommanderROR eink fanatic Posts: 2,022 Karma: 4924 Join Date: Mar 2006 Location: Germany Device: STAReBOOK, iRex Iliad, Sony 505, Kindle 2	The guys int the Sony Forum are having trouble measuring their battery-life. The Device seems to refuse to consume any energy...:-) Since the Sony Reader is also a Linux device, battery-life in these regions should be possible for the Iliad as well. Let's hope iRex devote some resources to working on this soon...

10-09-2006, 05:18 AM	#35
tribble iLiad Maniac Posts: 1,382 Karma: 2369 Join Date: Apr 2006 Location: Germany Device: Bookeen Opus (i love that thing) and iPad (what an irony)	Oh yes, please. I would soooooo dig that Its quite funny to see the Reader people have trouble measureing their battery life. Thats a problem i would like to have.

10-09-2006, 10:05 AM	#39
DrBibber Iliad geek Posts: 37 Karma: 10 Join Date: Jul 2006 Device: Iliad	And I guess the Sony uses a Sony battery. This may reduce its overall lifetime ;-)

10-09-2006, 10:56 AM	#41
CommanderROR eink fanatic Posts: 2,022 Karma: 4924 Join Date: Mar 2006 Location: Germany Device: STAReBOOK, iRex Iliad, Sony 505, Kindle 2	@jaed The similarities don't end there. All the additional features of the Iliad can be turned off when you don't use them, so the only factor is the CPU and the larger screen. the CPU should not be a major problem since it will also be in idle mode most of the time if you use the Iliad like a Sony Reader (e.g. just for reading). The larger screen is an unknown factor, just like the additional gray-levels. Apart from that, you can compare the devices very well.

10-09-2006, 11:05 AM	#43
DrBibber Iliad geek Posts: 37 Karma: 10 Join Date: Jul 2006 Device: Iliad	But isn't it too hypothetically? Do we know the capacity of the iLiads and the Sony battery to have a comparison? Maybe one of the both devices is better in energy saving and loses this benefit because of low dimensioned batteries.

10-09-2006, 11:26 AM	#45
doctorow Guru Posts: 914 Karma: 3410461 Join Date: May 2004 Device: Kindle Touch	Well in all fairness, the two devices are similar in the way that they claim to be e-readers. And from e-readers - especially with E Ink technology - one should expect a decent battery life.